Elements and Compounds
Molecular Mass

# What is the molecular mass for MgO?

When there is only one atomic symbol shown for each element in the formula of a compound, as with MgO, the molecular mass is simply the sum of the gramatomic masses, in this instance, 40.304 grams.

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This mass is 40,3044 g.

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## Related Questions

40 Percent. molecular mass of MgO = 24 + 16 = 40 percentage of oxygen = 100 x 16/40 = 40 .

Magnesium undergoes a chemical reaction when it burns: It combines with oxygen out of the atmosphere to form magnesium oxide (MgO), which has more mass than the Mg alone. The atomic mass of magnesium is 24.3, but the molecular mass of MgO is 40.3 (24.3 + 16.0).

MgO is ionic because it is a bond between a metal(Mg) and a non-metal(O).

The formula mass for MgO is greater than that for Mg.

By definition, one mole would be the same as the atomic mass or molecular mass. You take the number of moles and multiply it by the molecular mass (divide by one mole for units to cancel). So if you have just 1 mole, the number of grams will just be the molecular mass. The molecular mass is the atomic masses of the elements in the compound added together.Mg- 24.3O- 16.0MgO- 40.3 grams in one mole

Magnesium oxide is an ionic compound with the formula MgO.

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